A video posted by Call of Duty (@callofduty) on May 1, 2014 at 6:02pm PDT

Coincidentally Spacey’s House of Cards’ character, Frank Underwood, plays various first-person shooters as a way to burn off steam and relax in the popular political drama. In season two his video game habit is disappointingly replaced by tinkering away at an American Civil War diorama.

Someone should tell Activision and Sledghammer games that Ubisoft already has a series called Ghost Recon: Advance Warfighter. Couldn’t they have come up with a more creative name?

According to Destructoid, Spacey’s character is the leader of a soldier of fortune group that has turned on the U.S. government. The game features hover bikes and exosuits that allow soldiers to jump high and cloak themselves.

Rumours started circulating on Thursday when this strange leaked sound file (seen below) made its way onto the interwebs today via Complex Magazine’s Soundcloud account.

It features Spacey ranting about wars and foreign government-building and lacks the southern drawl his Frank Underwood character has. It also doesn’t match up with any projects Spacey is reportedly working on. Clever internet sleuths also analyzed the seven second hiss at the end of the recording. Apparently it’s not just random audio feedback.

It’s a spectogram – essentially an image built with audio frequencies. If you run the audio through a visualization program, you get this picture of a man holding a rifle. The first person to figure this out deserves some sort of award.

Spectrogram of the Kevin Spacey audio recording. Variety

According to Yahoo games if you look at the official Call of Duty website you’ll see an image that is very similar to the above spectogram (Variety also agrees with this theory).

Activision has used Hollywood talent in past Call of Duty games enlisting actors like, Gary Oldman, Ice Cube, Sam Worthington, Ed Harris and Kiefer Sutherland, to play various roles in the franchise.

While the Call of Duty franchise still sells well, the most recent entry, Call of Duty: Ghosts, received underwhelming reviews. Maybe securing notable actor like Spacey will finally make this next Call of Duty game’s plot be something worth actually following. Although I still wish he was playing the dog.

Kevin Spacey could be a major character int he next installment of the Call of Duty franchise.

As the bizarre theories continue, at least I can say I learned what a spectogram is today.